MIL-DTL-16034B
1.2.1.5 Kind of current. Two letters designate the kind of current for which the meter is designed, as follows:
AC - Alternating current (60 cycles per second, nominal frequency)
AD - Alternating current (60 cycles per second, nominal frequency), and direct current
AE - Alternating current (800 cycles per second, nominal frequency)
AF - Alternating current (400 cycles per second, nominal frequency)
AM - Alternating current (50 to 1,000 cycles per second)
AT - Alternating current (25 to 2,400 cycles per second)
DC - Direct current
RF - Radio frequency, conventional scale
RL - Radio frequency, linear expanded scale
1.2.1.6 Electrical units. Two letters designate the electrical units indicated by the meters, as follows:
UA - Microamperes
MA - Milliamperes
AA - Amperes
KA - Kiloamperes
MV - Millivolts
VV - Volts
KV - Kilovolts
1.2.1.7 Special features. A single letter designates a special feature, as follows:
H
- High-impact, shock-resistant
1.2.1.8 Special meters. Meters having special characteristics such as adjusted resistance and special scale
marks are identified by a National Stock Number.
1.2.1.9 Examples of type designation.
1.2.1.9.1 Switchboard meter. The type designation MR49W300DCVVH signifies:
a. MR -
Electrical-indicating meter
b. 49
-
4½ -inch rectangular flange, switchboard meter, flush-mounting, 250 degree nominal scale
c. W
-
White dial background with black markings and black pointer
d. 300 -
Zero left, full-scale value of 300
e. DC
-
Designed to be energized by direct current
f. VV -
Electrical units in volts
g. H
-
High-impact, shock-resistant
1.2.1.9.2 Portable meter. The type designation MR72W020ADAA signifies:
a. MR -
Electrical-indicating meter
b. 72
-
0.25 percent accuracy class portable meter with two ranges
c. W
-
White dial background with black markings and black pointer
d. 020 -
Full-scale value of 20 for highest range
e. AD -
Designed to be energized by 60-cycle alternating current and direct current
f. AA -
Electrical units in amperes
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